From 563fc272a36c8be317fbe95c8308ca2dfa29c3aa Mon Sep 17 00:00:00 2001
From: Quentin Dufour <quentin@deuxfleurs.fr>
Date: Wed, 7 Jul 2021 01:49:33 +0200
Subject: Vendor goldap, fix ASN.1 BER integer and length encoding

 - Add tests for goldap to prevent regressions
 - Disable reconnection for our functional tests
---
 goldap/message.go | 139 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 goldap/message.go

(limited to 'goldap/message.go')

diff --git a/goldap/message.go b/goldap/message.go
new file mode 100644
index 0000000..a227d16
--- /dev/null
+++ b/goldap/message.go
@@ -0,0 +1,139 @@
+package message
+
+import (
+	"fmt"
+	"reflect"
+)
+
+//   This appendix is normative.
+//
+//        Lightweight-Directory-Access-Protocol-V3 {1 3 6 1 1 18}
+//        -- Copyright (C) The Internet Society (2006).  This version of
+//        -- this ASN.1 module is part of RFC 4511; see the RFC itself
+//        -- for full legal notices.
+//        DEFINITIONS
+//        IMPLICIT TAGS
+//        EXTENSIBILITY IMPLIED ::=
+//
+//        BEGIN
+//
+//        LDAPMessage ::= SEQUENCE {
+//             messageID       MessageID,
+//             protocolOp      CHOICE {
+//                  bindRequest           BindRequest,
+//                  bindResponse          BindResponse,
+//                  unbindRequest         UnbindRequest,
+//                  searchRequest         SearchRequest,
+//                  searchResEntry        SearchResultEntry,
+//                  searchResDone         SearchResultDone,
+//                  searchResRef          SearchResultReference,
+//                  modifyRequest         ModifyRequest,
+//                  modifyResponse        ModifyResponse,
+//                  addRequest            AddRequest,
+//                  addResponse           AddResponse,
+//                  delRequest            DelRequest,
+//                  delResponse           DelResponse,
+//                  modDNRequest          ModifyDNRequest,
+//                  modDNResponse         ModifyDNResponse,
+//                  compareRequest        CompareRequest,
+//                  compareResponse       CompareResponse,
+//                  abandonRequest        AbandonRequest,
+//                  extendedReq           ExtendedRequest,
+//                  extendedResp          ExtendedResponse,
+//                  ...,
+//                  intermediateResponse  IntermediateResponse },
+//             controls       [0] Controls OPTIONAL }
+//
+
+func NewLDAPMessage() *LDAPMessage { return &LDAPMessage{} }
+
+func (message *LDAPMessage) readComponents(bytes *Bytes) (err error) {
+	message.messageID, err = readMessageID(bytes)
+	if err != nil {
+		err = LdapError{fmt.Sprintf("readComponents:\n%s", err.Error())}
+		return
+	}
+	message.protocolOp, err = readProtocolOp(bytes)
+	if err != nil {
+		err = LdapError{fmt.Sprintf("readComponents:\n%s", err.Error())}
+		return
+	}
+	if bytes.HasMoreData() {
+		var tag TagAndLength
+		tag, err = bytes.PreviewTagAndLength()
+		if err != nil {
+			err = LdapError{fmt.Sprintf("readComponents:\n%s", err.Error())}
+			return
+		}
+		if tag.Tag == TagLDAPMessageControls {
+			var controls Controls
+			controls, err = readTaggedControls(bytes, classContextSpecific, TagLDAPMessageControls)
+			if err != nil {
+				err = LdapError{fmt.Sprintf("readComponents:\n%s", err.Error())}
+				return
+			}
+			message.controls = controls.Pointer()
+		}
+	}
+	return
+}
+
+func (m *LDAPMessage) Write() (bytes *Bytes, err error) {
+	defer func() {
+		if e := recover(); e != nil {
+			err = LdapError{fmt.Sprintf("Error in LDAPMessage.Write: %s", e)}
+		}
+	}()
+	// Compute the needed size
+	totalSize := m.size()
+	// Initialize the structure
+	bytes = &Bytes{
+		bytes:  make([]byte, totalSize),
+		offset: totalSize,
+	}
+
+	// Go !
+	size := 0
+	if m.controls != nil {
+		size += m.controls.writeTagged(bytes, classContextSpecific, TagLDAPMessageControls)
+	}
+	size += m.protocolOp.write(bytes)
+	size += m.messageID.write(bytes)
+	size += bytes.WriteTagAndLength(classUniversal, isCompound, tagSequence, size)
+	// Check
+	if size != totalSize || bytes.offset != 0 {
+		err = LdapError{fmt.Sprintf("Something went wrong while writing the message ! Size is %d instead of %d, final offset is %d instead of 0", size, totalSize, bytes.offset)}
+	}
+	return
+}
+func (m *LDAPMessage) size() (size int) {
+	size += m.messageID.size()
+	size += m.protocolOp.size()
+	if m.controls != nil {
+		size += m.controls.sizeTagged(TagLDAPMessageControls)
+	}
+	size += sizeTagAndLength(tagSequence, size)
+	return
+}
+func (l *LDAPMessage) MessageID() MessageID {
+	return l.messageID
+}
+func (l *LDAPMessage) SetMessageID(ID int) {
+	l.messageID = MessageID(ID)
+}
+func (l *LDAPMessage) Controls() *Controls {
+	return l.controls
+}
+func (l *LDAPMessage) ProtocolOp() ProtocolOp {
+	return l.protocolOp
+}
+func (l *LDAPMessage) ProtocolOpName() string {
+	return reflect.TypeOf(l.ProtocolOp()).Name()
+}
+func (l *LDAPMessage) ProtocolOpType() int {
+	switch l.protocolOp.(type) {
+	case BindRequest:
+		return TagBindRequest
+	}
+	return 0
+}
-- 
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